1. Department of Gastroenterology, Affiliated Zhongshan Hospital of Dalian University, No. 6 Jiefang Street, Dalian, China
2. Department of Internal Medicine, Affiliated Zhongshan Hospital of Dalian University, No. 6 Jiefang Street, Dalian, China
3. Department of Heart Intensive Care Unit, The First Affiliated Hospital of Dalian Medical University, No. 193 Lianhe Road, Dalian, China
4. Department of Infection, Affiliated Zhongshan Hospital of Dalian University, No. 6 Jiefang Street, Dalian, China